# CVE-2018-15746: Denial of service in n/a

> Local guest users can crash the guest system by exploiting mishandled seccomp policies in QEMU threads.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 Aug 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-15746, GHSA-rp3q-x36m-62mp, UBUNTU-CVE-2018-15746

## What is CVE-2018-15746?

CVE-2018-15746 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 29 Aug 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

qemu-seccomp.c in QEMU might allow local OS guest users to cause a denial of service (guest crash) by leveraging mishandling of the seccomp policy for threads other than the main thread.

## Which versions are affected by CVE-2018-15746?

It affects 1 product.


Products: Qemu Qemu.

## How do I fix CVE-2018-15746?

Apply the vendor's patch.

## Is CVE-2018-15746 being exploited?

There is no known exploitation of CVE-2018-15746 in the wild and no public exploit code.

## Other vulnerabilities in Qemu Qemu

- [CVE-2022-36648](https://insights.sbomify.com/CVE-2022-36648/): Null dereference in n/a (critical 10.0)
- [CVE-2015-8556](https://insights.sbomify.com/CVE-2015-8556/): Race condition in n/a (critical 10.0)
- [CVE-2009-3616](https://insights.sbomify.com/CVE-2009-3616/): Use after free in n/a (critical 9.9)
- [CVE-2019-12928](https://insights.sbomify.com/CVE-2019-12928/): Command injection in n/a (critical 9.8)
- [CVE-2019-12929](https://insights.sbomify.com/CVE-2019-12929/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15746 and fix it if it is affected.

What it is: CVE-2018-15746 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 29 Aug 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-15746 in the wild and no public exploit code.

Affected product: Qemu Qemu. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-15746/ (Markdown: https://insights.sbomify.com/CVE-2018-15746/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15746
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15746
- OSV: https://osv.dev/vulnerability/CVE-2018-15746

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15746/
Summaries are generated and may contain mistakes; the official description above is the record.